The dealer is only as good as it's people. I bought my 6 from there 10 yrs ago. The service has been up and down. They seem to respond better when you fill out the surveys upon completion of the work.
I honestly think there service area is trying a bit harder these days, no customer service award banners since 2001 (?). Maybe because there is too much $ in the surrounding area? Like with any dealer you must be persistant to get what YOU want.
I use a small shop just north of there for all maintenance and bring it to the Knauz when I have to. They are very close to where I work so that plays a big part for me.